Remote control apparatus



Oct. 4, 1932.

W. AULL, JR

REMOTE CONTROL APPARATUS Filed Sept. 9. 1927 2 Sheets-Sheet l llllll'r Oct. 4, 1932.

. w. AULL; JR

REMOTE CONTROL APPARATUS Filed Sept. 9. 12527 2 Sheets-Sheet 2 IN V EN TOR.

Patented Oct. 4, 1932 I I p 4 i 1 1 394 I UNITED STATES PAENT Fries WILSON AULL, JR @L" ASTQRIA NEW 293th. REMOTE CONTRQI: AfPARATUEi Application filed Septemter 9, 19%. Serial Iho. $8,445. One object of my invention is to indicate Fig. 4 shows my invention as may be apthe position of and control the movement of plied to marine engine room telegraph. a movable device at a distance by means of Fig. 5 shows a device applied to a ship 4 simple and yet accurate electrical means. i as a helm indicator. {5 Another object is to controllably transmit In Fig. 1, lO'is a field ring of ferrous mate- 55 angular motion to a distance. rial carrying the pole pieces 11, 12, 13 and Another object is to produce a simple 14: which in turn carry the pole tips or shoes electrical device in which the angular mo- 15 and 16. The armature-17 carries the windt on of a Prime mover may used to opering 18 and is rotatably supported on the shaft 10 ate or adjust a local piece of apparatus quan- 19, Which in turn may carry the pointer or 50 titatively from a distance. indicator 20 or a suitable coupling may be v Another object is to produce an electrical p v ed. The power source 21 may be a bat indicating or motion translating device tery,. tr nsformer 01' any other Suitable which is entirely independent, as to accurzwy source. The poles l2 and 14: carry the wind- -15 of th tate of thelbattery or other power ings 22 and 24 which may be of manyturns g5 source within wide limits. of relatively fine wire and are of the type The motor part of the device consists of windings sometimes known as voltage preferablyof anumberof field coils acting in ings. the armature winding 1'8is of upon an'arm ature. Groups of said-field coils the m yp The wmdlngs 22 d 24 may .20 are arranged so t upon th armature be connected in series and across the power 7% in rotational opposition to each other. The ay e the armature i g strength of the current flowing in one set 9 Wlndlngs 18 and Qtmay an be I is constant for a given applied voltage. The 111 genes and (,lonlflected across file P strength of'the current in the other group is e Sourc'e- The n g 25 and 27 On the P0198 I 25 controlled from a distant point; The arn'oa- 11 a '13 y be'oi: heavie? Wire 0f the -75 keep theirsame' ratio regardless of voltage 4 voltage of the power source as long as this ture will then'take up a posit-ion dependent. n iicurrfent Operated yp and m y, n th r l ti tr th fth fi ld groups, have 1I18I16S w th them and the powersource andby properly proportioning the i di the variable resistor 28 having the reslstance control resistor, and other parts of the de- Wmdmg; 9 l the mc'vable Contact 30 vice the motion of the armature may be made resls-tor. may h T a shapes 30 v directl or otherwise proportional to the 1110- Of Wfnmngs d m l n dependmg P l I tion 0 the control device. .As all the fields type of m m 1t 1s t fitransmlt are operated from'the one power source and f; translate Voltage f d 22 n as Position of the armature is due to the p 21 may be so proportioned that their flux 1s- 4 equal tothe flux of the current windin s 5 v relatlve field Strengths these Strengths W111 when one-half the resistance ofthe resist dr 28 is cut in; The operation is as follows 2' The armature tends to takeup the posi-v tion of least average reluctance for the mags netio system as a who-le- Thisposition is 0 that in which the magnetic'ce'nter line-oi Y 1S 9 longer p the armature will registerwith the position p to h drawmgs: 1 of maximum average flux density. This pogrammablc i of OHGJfOTmf motor sition is dependent upon the relation of the control'statlon t Power sourceampere turns. or fiuii density'of the poles 11 fluctuation at the 1 power source so that the accuracy of the device is independent of the does not fall below a point at which the'de I" g: 248,8! diagrammatic a ng .0 my and l3'to the poles 12 and 1a which'is inturn system'inuse as aliquid level indicator. dependent upon the resistance in use at the p v Fig. 3- shows a device used to remotely *resistor 39 and therefore the position of the control there'sonant -frequency ofa typical arm 30; A small adjustable resistance I t broadcast radio receiver; v may be. provided to compensate upon installoo the rheostat 28.

lation of varying lengths of the control lines 32 and 33. It will be seen as the position of the armature depends upon the relation between the ampere turns in the two branch circuits which in turn depends upon the resistance of these circuits it is independent .of Variations of voltage at the power source unless voltage should drop so low as to makethe device inoperative.

Fig. 2 shows the device applied as a liquid level indicator. A tank 40 contains the liquid 41 which supports the float 42 which by means of the arm 43 changes the position of" the slider or contact 30 of the variable resistor 28 which in turn operates the indicating hand 20 of the prime mover 10 through suitable gears, indicating upon the scale 44 the level of the liquid in the tank.

In Fig. 3, 50 represents a typical broadcast radio receiver of a uni-control type in which the motor 10 (like the motor of. Fig. 1) has been substituted for the usual frequency control dial and the resonant frequency is now controlled by the rheostat 28 which may be calibrated in any desired manner, such as scale divisions, frequency or wave length. The fineness of angular control may be made as great as desired by increasing the power of the prime mover and providing a large number of steps, convolutions, or contacts on The power operating the prime mover may preferably be obtained from the source of power 21 used to heat the cathodes of the vacuum tubes in the receiver.

Fig.4 shows my invention applied as onehalf of a typical engine room telegraph for a power driven vessel.

Here the rheostat slider 30 is actuated by the hand lever 51 so as to control the motor 10" and move the indicator 52.

Fig. 5 shows a system applied to a bridge helm indicator for ships in which the arm or contact 80 of the resistor 28 is operated in some suitable manner by the rudder post 60 and the prime mover 61 (like'lO) operates the indicator 62 upon the bridge or other desired point.

It should be understood that the magnetic structure of the devicemay be laminated so as to make it suitable for operation on alternating currents of commercial frequencies,

and that several pairs of poles may be used with or without the magnetic connecting shoes and with both strengthening and neutralizing windings. It should be understood that I do not wish to limit myself to the magnetic structure, character of windings, type and configuration of control rheostat, or other matters of detail design except in so far as these matters are hereinafter limited by the following claims.

What I claim is:

1. Apparatus for quantitatively controlling motion from a distance which consists of at least one pair of potential operated poles and an equal number of pairs of ourrent'operated poles, a power source, an armature and a variable resistor, said potential operated poles being-directly connected to said power source, said current operated poles being connected to said power source in series with said variable resistor, the direction of the resultant field being independent of variations in said source of voltage but inversely proportional to the resistance in circuit and energizing coils upon said armature to cause it to place ltself 1n accordance with said field, the space between the ends of the armature and the poles affording a substantially constant air gap of uniform length.

2. A remote control motor comprising a' field ring having pairs of projecting poles some of which have current windings and some of which have potential windings. a compensating resistance in series with the potential windings and an armature having armature.

l/VILSON AULL, JR. 

